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净现值=16*（P/A,10%,4)*(P/F,10%,2)+27*（P/A,10%,5)*(P/F,10%,6)+47*(P/F,10%,10)-100-20*(P/F,10%,2)=
现值指数=1+净现值/(100+20*(P/F,10%,2))=
2023 06/17 12:15
wu老师 
2023 06/17 12:21
净现值=16*（P/A,10%,4)*(P/F,10%,2)%2b27*（P/A,10%,5)*(P/F,10%,6)%2b47*(P/F,10%,10)-100-20*(P/F,10%,2)=16*3.169*0.8264%2b27*3.79*0.5645%2b47*0.3855-100-20*0.8264=1.26
现值指数=1%2b净现值/(100%2b20*(P/F,10%,2))=1%2b1.26/116.53=1.01
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